//存放游戏的一些参数

var WIDTH = 1000
var HEIGHT = 700

var PLAYER_WIDTH=100
var PLAYER_HEIGHT=80

var PLAYER2_WIDTH=80
var PLAYER2_HEIGHT=60

var PLAYER2_SPEED=10
var PLAYER2_FREQUENT = 20

var BULLET_WIDTH=10
var BULLET_HEIGHT=10
var BULLET_SPEED=10

var DOWN = 0
var LEFT = 1
var RIGHT = 2
